Perhaps you should try some spelling variations:
cong thang » cong thanh, cang thang, cong thong
hang hang » nang hang, cang thang, hung thang
tai nhung » thai nhung, thi nhung, tai hung
hoc hieu » hoc thieu, hoc hien, doc hieu
hieu cua » hieu qua, dieu cua, bieu cua
hang tai » hang va, dung tai
cong tac » cong ty
toan cao » toan tap
toan ban » van ban

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: hoc hieu cua - hang hang tai nhung ((cong tac) or (cong thang)) ((toan cao) or (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hieu cua - hang hang tai nhung ((cong tac) OR (cong thang)) ((toan cao) OR (toan ban)).
• Adding a wildcard symbol may retrieve word variants: hoc hieu cua - hang hang tai nhung ((cong tac) or (cong thang)) ((toan cao) or (toan ban))*.